Problemive been reading about dorsal raphe nucleus a, Ask an Expert

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I've been reading about Dorsal Raphe Nucleus, a serotonin- rich part of the brain. I noticed mentioning of "tonic activity" - regular pulsing that releases neurotransmitters. On top of this "tone" the nucleus can fire bursts of spikes(action potentials?) that further increase neurotransmitter concentrations for a short time.

Question: Is this kind of tonic firing common throughout the brain, or is it DRN specific? Please explain your answer.

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Category:- Biology
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